I accepted a free copy of this book in exchange for my review. This isn't exactly my genre, but the author's worldbuilding made what was (for me) a very fresh take on an old monster/paranormal trope.
There are three main characters in the story: a human, a incubus, and a third one I won't reveal here (don't worry, you meet her soon enough). Hell is sort of a dangerous bureaucracy, where the poor earth-bound demons are trying to punch their clock and stay under the radar. This particular incubus prowls by night and has a woodworking hobby during the day! The mission of the incubus is centered around the temptation of mortals rather their outright violation, so their job description of "spreading evil" seems almost tame at first; however, there are references to demons who stray too far, and get into things they shouldn't, ultimately going insane and bringing chaos wherever they go. The demons in the story are "immortal" of course, in that they don't die due to the mere passage of time (they seem to measure their chronological age in centuries, though the absence of an aging process seems to make that academic except for their cultural outlook).
Of course, there's a lot of sex in the book, as appropriate for the genre. It's pleasant to see the author mix things up: there's some variety, but not so much that it becomes variety for its own sake. As the heroine, Britt, and the demons are all threatened by a sinister mystery that takes them all by surprise, the characters each learn a little bit more each chapter. These revelations are often (but not always) very close in time to the sex scenes, but there's enough variety to keep the reader guessing.
The character of the incubus is particularly interesting. He doesn't make the impression pop culture has led us to expect from incubi --- sometimes even coming off as rather passive. He's certainly just as confused as everyone else about what's going on.
The setting isn't explored very much, but that's okay. It's a college town, full of people who don't plan to live there more than a few years, and who are all pretty much wrapped up in themselves and their own plans. It serves its purpose admirably, without too much description or detail. I also liked the humor in the book. There wasn't buckets of it, but what there was was deployed thoughtfully and skillfully. (Some male readers may find Britt's mortal boyfriend reminds them a bit too much of themselves from their college years).
If I had to choose a part of this book I didn't care for, I suppose I'd have to go with the ending. The story seemed to wrap up too quick for me, and then take too long to end after all the conflict seemed to be over. I didn't see anything left unresolved that might lead to a sequel for this story.